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inkernel.c revision 1.7 
      1 /*	$NetBSD: inkernel.c,v 1.7 2008/04/28 20:23:15 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Kazuki Sakamoto.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <lib/libsa/stand.h>
     33 #include <sys/param.h>
     34 #include "boot.h"
     35 #include "magic.h"
     36 
     37 #define	KERNENTRY	(RELOC - 0x200000)
     38 
     39 void
     40 init_in()
     41 {
     42 	int p;
     43 
     44 	for (p = endaddr(); p < KERNENTRY; p += sizeof (int)) {
     45 		if (*(int *)p != ENTRY ||
     46 		    *(int *)(p + sizeof (int)) != 0 ||
     47 		    *(int *)(p + sizeof (int) * 2) != 0)
     48 			continue;
     49 
     50 		p += sizeof (int) * 3;
     51 		if (memcmp((char *)p, magic, MAGICSIZE) == 0) {
     52 			kern_len = *(int *)(p + MAGICSIZE);
     53 			memcpy((char *)KERNENTRY,
     54 				(char *)(p + MAGICSIZE + KERNLENSIZE),
     55 				kern_len);
     56 			break;
     57 		}
     58 	}
     59 }
     60 
     61 int
     62 inopen(p)
     63 	struct open_file *p;
     64 {
     65 	if (kern_len)
     66 		return (0);
     67 	return (EINVAL);
     68 }
     69 
     70 int
     71 inclose(p)
     72 	struct open_file *p;
     73 {
     74 	return (0);
     75 }
     76 
     77 int
     78 instrategy(devdata, func, blk, size, buf, rsize)
     79 	void *devdata;	/* device uniq data */
     80 	int func;	/* function (read or write) */
     81 	daddr_t blk;	/* block number */
     82 	size_t size;	/* request size in bytes */
     83 	void *buf;	/* buffer */
     84 	size_t *rsize;	/* bytes transferred */
     85 {
     86 
     87 	memcpy(buf, (char *)KERNENTRY + blk * DEV_BSIZE, size);
     88 	*rsize = size;
     89 	return (0);
     90 }
     91